Lock device for dial telephones



Dec. 8, 1931. E. a. LANDRESS LOCK DEV ICE FOR DIAL TELEPHONES Filed Sept. 2, 1950 INVEN TOR. mmwe/ [Quizzes Patented Dec. 8, 193 1 entran S T ATES' EMMANUEL I. LANIDRESS, or BnooKLYmnEw YOR PATENT OFF! Locxnnvicn. r03 DIAL rnmirnonns Application filed September 2, 1930. Serial No. 479,287,

This invention relates to lock devices for dial telephones, employing rotary, reciprocating, call dials for calling telephone numbers, operators, andthe like, and particularly to the provision of. a lock device adapted to be mounted upon and coupled with such call dials, which willrender the same'inoperative, so as to prevent unauthorized use of the telephone; andthe object of the invention is to provide a lock of the class specified comprising a housing or cap adapted to be placed upon and envelop the call 'dialof a telephone, andprovide d. with means engaging said dial and the stop arm thereof torender the same inoperative; a further object being to provide a tumbler lock element for controlling and actuating the lock member nated by suitable reference characters in each oi. the views, and in which Fig. 1 is a plan view of one of my improved lock devices, with part of the construction broken away and indicating itsarrangement upon the dial of a telephone. 7?

Fig. 2 is a section onthe' line 22 of Fig.1. f Fig. 3 is a bottom, plan View of the device detachedpand, 1 1

Fig. .4 is a "section on the line of Fig. 2. i

i In Fig.1 of the drawings, I have indicated at 5 by dot and dash lines,the outline of the base of a telephone of conventional form, 6 representing the transmitter standard, 7 the dialhaving. circumferentially spaced, apertures .8, used in callingzvarious; telephone numbers, and 9 the hook-shaped stop-arm secured to the permanent, portion of. thedial use in connection. with what arefknown as as hereinafter described and will-be understood that said'key 19 is deand arranged over the apertures 8. All of this construction is of conventional form and has been indicated merely to show the relative arrangement of the several parts of my improved dial. 7 y

In thedraw'ings, I have shown at 10, the cap or housing of my improvedlock consisting-of a top wall 11 and a depending, periph eral wall 12, the lower end portion of which is flared slightly as seen at 13, so as to fit ce t.

lock in connection with thecall freelyuponthe dial 7 of the telephone. The

top wall 11 is provided with an outwardly pressed, annular bead 14 forming a bearing for the tubular casing 15' of a cylinder lock 16. The tubular casing15 has at its inner edge, spaced, projecting, arc-shaped portions 17 which pass through the top wall 11 inwardly ofthe bead 14, and ,are riveted over to secure the casing in connection with the wall 11.

Centrally ofthe bead 14.,the top wall 11 *is apertured as seen at 18, to receive the cylinder 16 which projects through said wall a slight degree, as clearly seen in Fig. 2 of the drawings. The cylinder 16 is retained in the casing at its outer end by an enlarged head 16a in the outerface of which is formed a key aperture, to receive the'key19. It

tachable with respect to thecylinder at will, but will be retained against displacement therefrom when the device is in open position, so that the key may be used as ahandle, facilitating the attachment and detachment ofthe, device in connection with the dial.

At the inner end of the cylinder 16are two projecting pins 20 adapted to pass through corresponding apertures in the lock member or plate 21 of my improved device, and a screw 22 is adapted to bepassed through anapertureinthe plate 21 and is in threaded engagement with the cylinder .16 as seen at 23 in Fig. 2 of the drawings. .This screw is arranged in spaced relationto the; pins 20 and serves to retain the plate 21in connection with the cylinder, and also retain said cylinder. against displacement from the casing '15.

As will be noted, the plate 21'is arranged J upon the inner face of the top wall 11 of the cap or housing 10. Formed in the pcripheral edge of the plate 21, at spaced. intervals, are a plurality of hook-shaped or L shaped lock fingers 24, which are adapted to be passed through a corresponding number of apertures 8 in the dial, and to engage the sections 8a, intermediate said apertures, when the plate 21 is rotated in moving the same into locked position.

At a predetermined point in the peripheral edge of the plate 21, is formed a stop member 25 having spring properties, and the side edges of which are beveled as seen at 26 to pass freely over an inwardly pressed bead 27 formed in the top wall 11 in such relation with respect to the member 25 and the stop walls 28 as to provide the required movement of the lock lingers 25 in the operation of locking and unlocking the device with respect to the call dial.

The depending wall 12 and its flared extension 13 are cut out at a predetermined point as seen at 29, note Fig. 1 01" the drawings, to receive the t spending portion 9a of the stop arm 9, so as to key the cap or housing 10 against rotation with respect to the dial, whereas the hook-shaped lock fingers 2% when moved into operative position, prevent the upward movement of the cap 10 with respect to said dial, thus retaining the device against displacement from the telephone. However, by inserting the key 19 and rotating the lock cylinder, the plate 21 and its fingers 24 may be moved into p0- sition to permit the detachment of the entire device from the call dial, by upward movement with respect thereto, the fingers 24 passing through the apertures 8 in this operation. It will be noted that in moving the lock plate 21 from its open to its closed position, the stops 2S thereo'twill engage the bead 27 to limit the rotary movement of said plate. The spring member 25 passes over the bead 27 in this operation.

The tumblers 30 of the cylinder 16 are adapted to extend into a recess 31 formec in the bore of the casing 15 when said cylinder is in locked position and the key 19 serves to move said tumblers out of engage ment with said recess to permit the rotation of the cylinder to correspondingly rotate the plate 21. Another recess 31a, similar to the recess 31, is provided so as to modify the setting of the lock if desired.

In this connection, it will be understood that my invention is not necessarily limited to any particular type of cylinder lock, nor

to the manner of its control and operation. as any conventional type of lock device 01 this class may be employed for actuating the'lock plate 21. Various other changes in and modifications of the construction here in shown and described, may be made within the scope of the appended claims, without departing from the spirit of my invention or sacrificing its advantages.

Having fully described my invention, what I claim as new and desire to secure by Letters Patent, is:

1. T he combination with the call dial of a telephone, of a lock device mounted and supported in connection with and adapted to control the use of the operative element of said dial, said device comprising a cup-shaped body mounted directly upon and encircling said dial, a lock member within said body, a cylinder tumbler key lock mounted in con nection with said member and by means of which the same is moved into open and closed positions.

2. The combination with the call dial of a telephone, of a lock device mounted and supported in connection with and adapted to control the use of the operative element of said dial, said device comprising a cupshaped body mounted directly upon and encircling said dial, a lock member within said body, a cylinder tumbler key lock mounted in connection with said member and by means of which the same is moved into open and closed positions, and means for supporting said cylinder lock in connection with the central portion of said body, and accessible through the upper face thereof.

3. The combination with the call dial of a telephone, ot' a. lock device mounted and supported'in connection with and adapted to control the use of the operative eien'lent of said dial, said device comprising a cupshaped body mounted directly upon and encircling said dial, a lock member within said body, a cylinder tumbler key lock mounted inconnection with said member and by means of: which the same is moved into open and closed positions, means for supporting said cylinder lock in connection with the central portion of said body and accessible through the upper face thereof, and means for preventing the rotation of said body with respect to said dial.

4. The combination with the call dial of a telephone, of a lock device mounted and supported in connection with and adapted to control the use of the operative element of said dial, said device comprising a cupshaped body mounted directly upon and encircling said dial, a lock member within said body, a cylinder tumbler key lock mounted in connection with said member and by means of which the same is moved into open and closed positions, means for supporting said cylinder lock in connection with the central portion of said body and accessible througl'i the upper face thereof, means for preventing the rotationof said body with respect to said dial, and means vfor limiting the movement of said lock member with respect to said body.

The combination with the call dial of a telephone, employing a rotary, reciprocating member and'a stop arm cooperating with said member, of a lock'device comprising a cup-shaped housing mounted upon and encircling said member,-means on said housing cooperating with said stop arm'tor keying the housingagainst rotation on said dial, a lock member in said housing and cooperating with said reciprocating member to retain the same against movement, and a tumbler lock mounted in connection with said housing and movement thereof into locked and unlocked said member, means on said housing cooperating with said stop arm for keying the housing against rotation on said dial, a lock member in said housing and cooperating with said reciprocating member to retain the same against movement, a tumbler lock mounted f 111 connection with said housing and coupled with said lock member to control the movement thereof into locked and unlocked pos1.-. tions, and means controlling the operation of said tumbler lock.

7. The combination with the call dial of a telephone, employing a rotary, reciprocating member and a stop arm cooperating with said member, of a lockdevice comprising a cupshaped housing mounted upon and encircling said member, means on said housing cooperating with said stop arm for keying the housing against rotation on said dial, a lock member in said housing and cooperating with said reciprocating member to retain the same against novement, a tumbler lock mounted in connection with said housing and coupled with'said lock member to control the movement thereofinto locked and unlocked positions, means controlling the operation of said tumbler lock, and means for limiting the ber within the housin movement of said lock member with respect to said housing,

8. A devlce of the class described comprising a cup-shaped housing, a tumbler lock said housing and projecting into the chamber within the housing,'a lock member in said housing, and means for coupling said look a lock member in member with said tumbler lock whereby the 'rotationmotsaid tumbler lock will correspondingly rotate said member, means for limiting the movement of said member lIlliWO directions within said housing, .and means controlling the operation of said tumbler member=iinto open and closed positions. i 10. A" device of: the class described comprising a cup-shaped housing,-a tumbler lock mounted-in connection with the top wall of said housing andvprojecting into the chamber within the" hous1ng,"a lock member 111 said housing, and means for coupling sald lock member withsaid tumbler lock-whereby the rotation of said tumbler lock will correspondingly rotate said member, means ior limlting themovement of said member in two directions'within said housing, means controlling the operation of said tumbler Ilock'to control the movement of said lock member intoopen and closedpositions, and

said lock member having a plurality of spaced, hook-shaped lock elements.

'7 11. A device of the class described compris- .ing a cup-shaped casing, a tubular housing supported on the vtop wall of the casing, a tumblerlock mounted in said housing, the bore of said housing having alongitudinal groove, the tumblers of said lock being a lock element arranged within said casing and secured to the inner end ofsaid tumbler lock and movable into operative and moperative positions in the rotation of said tum: bler lock by a key actuating "the tumblers, thereof. 1

12. A device of the class described com prising a cup-shaped casing, a tubular housing supported on the top wall of the casing, a tumbler lock mounted in said housing, the bore ofsaid housing havinga longitudinal groove, the tumblers of said lo'clr' bein adapted to enter said groove to key the lock against rotation with respect to the housing, a lock element arrangedrwithin said casing and secured to the inner end of said tumbler lock and movable into operative and inoperative positions in the rotation ofsaid tumbler look by a key actuating the tumblers thereof, and means for retaining the tumbler lock against longitudinal displacement in said housing.

13. A device of the class described com-v prising a cup-shaped casing, a tubular hous ing supported on the top wall of the casing. a tumbler lock mounted in said housing, the

' bore of said housing having a longitudinal groove, the tumblers of said lock being adapted to enter said groove to key the lock against rotation with respect to the housing, a lock element arranged within said casing and secured to the inner end of said tumbler'lock and movable intooperative and inoperative lock to control, the movement-of saidlock 1 adapted to enter said groove to key the lock 7 against rotation with respect to the housing, V

positions in the rotation of said tumbler lock by a key actuating the tumblers thereof, and means on the casing cooperating-With said lock element for limiting the movement thereof in two directions.

14. A device of the class described comprising a cup-shaped casing, a tubular housing supported on the top Wall of the casing, a tumbler lock mounted in said housing, the bore of said housing having a longitudinal groove, the tumblers of said lock being adapted to enter said groove to key the lock against rotation with respect to the housing, a lock element arranged Within said casing and secured to the inner end of said tumbler V lock and movable into operative and inoperative positions in the rotation of said tumbler lock by a key actuating the tumblers thereof, means on the casing coope-rating With said lock element for limiting the movement thereof in two directions, and said lock element involving a disk and a plurality of hook-shaped fingers on said disk Within said casing.

In testimony that I claim the foregoing as my invention I have signed my name this 29th day of August, 1930. V

EMMANUEL I. LANZDRE'SS. 

